China ; Climatic warming ; Ground penetrating radar ; Hydrology ; Lake ; Periglacial features ; Permafrost ; Plateau ; Qinghai ; Subsurface flow ; Thawing ; Thermokarst ; Tibet
The AA. employed ground-penetrating radar (GPR) profiling, topographic mapping and drilling to explore the interaction between hydrological processes and thermokarst lake development at a site on the Qinghai-Tibet Plateau (QTP). The GPR data
. Such a process-based qualitative understanding is crucial for assessing the impact of climate change, in conjunction with the local topography and hydrogeology, on the evolution of thermokarst lakes on the QTP.
Quantifying wedge-ice volumes in Yedoma and thermokarst basin deposits
Alaska ; Arctique ; Coin de glace ; Glace du sol ; Géomorphométrie ; Image satellite ; Pergélisol ; Photographie aérienne ; Périglaciaire ; Russie d'Asie ; Région polaire ; Sibir' ; Sol figuré ; Système d'information géographique ; Thermokarst
; Satellite imagery ; Siberia ; Thermokarst
The AA. present a method for calculating wedge-ice volume (WIV) in late Pleistocene Yedoma deposits and Holocene thermokarst basin deposits at 4 study areas in Siberia and Alaska. Ice-wedge polygons and thermokarst mound (baydzherakh) patterns were
the study sites and within certain terrain units. Calculated maximum WIV ranges from 31.4 to 63.2 vol% for Yedoma deposits and from 6.6 to 13.2 vol% for thermokarst basin deposits.
Characterising runoff generation processes in a lake-rich thermokarst landscape (Old Crow Flats, Yukon, Canada) using δ18 O, δ2 H and d-excess measurements
Canada ; Deuterium ; Geochemistry ; Isotope analysis ; Lake ; Oxygen 18 ; Runoff ; Space time ; Thermokarst ; Tracer ; Yukon Territory
In Old Crow Flats, a lake-rich thermokarst landscape in northern Yukon Territory (Canada), local land users have concerns over the effects of recent lake drainage and fluctuating river discharge on their traditional way of life. In the absence
Analyse isotopique ; Arctique ; Carbone ; Cycle du carbone ; Dégel ; Effondrement ; Erosion littorale ; Géochimie ; Humidité du sol ; Laptevyh more ; Littoral ; Russie d'Asie ; Réchauffement climatique ; Sibir' ; Thermokarst ; Zone froide
; Thermokarst
of degradation. The moisture-limited and beach-protected ICD bluff near Buor-Khaya Cape, characterised by thermokarst mounds (baydzherakhs), represents a dormant regime with limited ongoing degradation. Conversely, the more exposed ICD scarps on eroding